thanks. >>> we're going to turn to the aftermath of the shootings in newtown, connecticut. there's a lot of questions in this country about children and mental illness. one thing that is clear about 20-year-old adam lanza, he had been troubled for a long time. and his mother was unable to help him. an estimated one in five children suffer from mental disorder or illness in this country. and their parents are often desperate for help and for answers. for millions of americans who have children with mental illness or disorders, the struggle is a daily one. >> it's terrifying. it's distressing. the legacy of parents being blamed for their children's mental illness lingers. >> reporter: tricia knows this firsthand. >> my son battles mental illness. we've been battling it since the fall of 2008. >> reporter: in november, she prevented a tragedy by calling police on her 20-year-old son, blake, who was plotting a movie theater massacre at the screening of "twilight." authorities stopped him in time. >> i think any mom would blame herself. >> reporter: how to help troubled, young p